Quite possibly because it is the most simplest of questions to find answers too because it is asked in 15 threads per day. It clogs up the forum from people who actually have questions of a more personal nature that may not be as easily answered by simple reading on a forum or the net. It is also not something that one can answer for someone else because it is a personal preference and opinion question.
Very true, not to mention it's often better to look at reviews mainly not 'users'.
Users generally only only use one make, they MAY have tried others but most people are brand loyal so they will often say their camera is the best choice when they havn't tried the competition.
That's why I try to backup my reccomendations with research. I havn't used the D60 or 450D BUT I counter it by looking at the reviews. Reviews ( dpreview for example ) tend to be reasonably balanced and the cons list can be very handy for making decisions.
For example :-
----------- Camera 1 ---------------
Average automatic white balance performance, still very poor under incandescent light
Limited exposure compensation range (+/- 2.0 EV)
Contrast detect AF so slow it's useless for most types of photography
Metering has tendency to overexpose in very bright, contrasty conditions
Default JPEG output may be a little 'over processed' for some tastes (raw far more flexible)
Flash must be up for AF assist lamp (although AF is good even in low light)
Automatic AF point selection unpredictable (use center AF, it's safer)
Occasional total focus failures (in our case only 5 or 6 shots in almost 2000)
New Auto Lighting Optimizer doesn't really seem to do anything
No mass storage USB support
A little pricey
---------- Camera 2 -----------------
No lens motor in body means non-AF-S/AF-I lenses are manual focus only
Disappointingly RAW+JPEG setting only records Basic quality JPEG's
Default settings a little on the soft side at a pixel level
High ISO performance good, but not as good as best in class
No exposure or white balance bracketing
No hard buttons (without customizing) for ISO or White Balance
No depth-of-field preview
Fixed exposure steps (1/3 EV)
Disappointing automatic white balance performance in incandescent light
Supplied software still offers limited raw conversion options
Limited image parameter adjustment (especially for color saturation)
No Mass Storage USB support (MTP/PTP only)
---------- Camera 3 -----------------
Default JPEGs too contrasty, oversharpened and smeared
JPEG engine not making the most out the camera's RAW data
No live view
Few direct buttons (but Function menu sort of makes up for it)
Dynamic range in the highlights slightly below average (but efficient D-Range tool)
Limited continuous shooting capability, slower than average and small buffer
Flash must be raised for AF assist (although AF works even in very low light)
No Kelvin white balance option
Not saying which is which but I know which I'd choose.